Stable carbonic-acid solution and method of producing same.



UNITED STATES PATENT oEEIcE.

ERNST RUDOLFI, OF BERLIN-HALENSEE, GERMANY, ASSIGNOR TO L. ELKAN EBBEN GESELLSCHAFT M. B. H., OF BERLIN-WESTEND, GERMANY.

STABLE CABBONIC-A CID SOLUTION AND METHOD OF PRODUCING SAME.

No Drawing.

To all whom it may concern:

Be it known that I, Dr. ERNST RUDOLFI, a subject of the Emperor of Germany, and residing at Berlin-Halensee, Germany, have invented certain new and useful Improvements in and Relating to Stable Carbonic- Acid Solutions and Methods of Producing Same, of which the following is a specification.

My invention relates to a process for the manufacture of carbonic acid waters for any purpose, for example for the manufacture of artificial carbonic acid solution, or carbonated water for general purposes, or for carbonic acid baths, in which the carbonic acid (CO is absorbed to a large degree and in which the carbonic acid does not escape from the water as quickly as is the case with the ordinary commercial carbonic acid baths hitherto known.

I have found that by adding certain coloring matters derived from living organisms to the water, especially chlorophyl and hcmoglobin and their derivatives, which in nature also exhibit the property of loosely retaining carbonic acid, the capacity of the water for absorbing carbon dioxid is substantially increased. It is immaterial, so

far as the present invention is concerned, whether-as in nature-a loose retention of the carbonic acid by the coloring matter occurs, or whether other reasons for this phenomenon exist. It has been shown that the bath will hold an increased quantity of CO in solution, when said coloring matters are added, over the quantity which would be held in solution by the same "olume of water without the said coloring matters, at the same temperature.

In order to exactly ascertain whether water, in which carbonic acid is generated from equivalent quantities of sodium bicarbonate and tartaric acid, dissolves a larger quantity of carbonic acid after the addition of chlorophyl, experiments were made, (1) at room-temperature say about 18 C. and (2) at 34 (3., both with and Specification, of Letters Patent.

Patented Nov. 20, 191 '7'.

Application'filed June 25, 1914. Serial N 0. 847,381.

without the addition of chlorophyl. To 1000 cubic-centimeters of water 0.01 g. of chlorophyl were added.

(1) Experiment at temperature of room.

The quantity of carbonic acid contained in 1000 cc. amounted' to:-

W'ithout chlorophyl. With chlorophyl.

Average 1.82 g. 2.18 g.

The solubility of carbonic acid in water at room-temperature is consequently increased by 17-18%.

(2) Experiments at 524 I The experiments were made at three different intervals, viz. immediately after the The solubility of carbonic acid in water at 34 C. was therefore increased about 30% by the addition of chlorophyl.

(2). After 15 minutes:

Without chlorophyl. With chlorophyl.

Average0.63 g. 0.98 g.

The quantity of carbonic acid which remamed for fifteen minutes in the water was therefore increased about by the addition of chlorophyl.

(3). After 30 minutes:

Without chlorophyl. W'itk chlorophyl.

Average0.54 g. 0.61 g.

of the appended claims is intended to coverboth hemoglobin and chlorophyl, as well as derivatives of either ofthese, and equivalents thereof.

The use of hemoglobin is not specifically claimed herein, although included within the scope of some of the appended claims. Such use isspecifically claimed in my application being a division hereof, Serial. No. 196,288, filed October 12, 1917.

Having now described my invention what I I claim as new and desire to secure by Letters Patent is: 0 1. The herein described process of producing carbonated waters containing rela tively large quantities of carbonic acid, which comprises adding to an aqueous liquid, a soluble coloring material which is a normal constituent of living cells and which has the property of loosely combining with carbon dioxid, and thereafter causing carbon dioxid in relatively large amounts to be absorbed by said liquid.

2. The hereindescribed process of producing carbonated Waters containing relatively large quantities of carbonic acid, which comprises producing an aqueous liquid containing dissolved chlorophyl, and thereafter causing a relatively large amountof carbon dioxid to be absorbed by said liquid.

3. The herein described process of producing carbonated waters containing relatively large quantities of carbonic acid, which comprises dissolving in an aqueous liquid, a chlorophyl derivative, causing carbon dioxid to be absorbed by said liquid.

4. The herein described product comprising a large amount of carbon dioxid dissolved in an aqueous liquid containing in solution a soluble coloring material which is a normal constituent of living cells, and which has the property of loosely combining with carbon d10Xld-,

5. The herein described product comprising a large amount of carbon dioxid dis solved in an aqueous solution containing chlorophyl.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

DR. ERNST RUDOLFI. Witnesses:

HENRY HASPER, WOLDEMAR HAUPT. 

